Quick answers
- Does Margaret C. Flynn accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret C. Flynn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Margaret C. Flynn see?
- In 2024, CMS data shows 366 Original Medicare patients and 916 services for Margaret C. Flynn. This counts Original Medicare only and measures volume, not quality.
- What is Margaret C. Flynn's NPI number?
- 1821094491. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Margaret C. Flynn, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 366 |
|---|---|
| Services billed to Medicare | 916 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)538 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)243 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)59 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)28 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)21 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure69%
- Diabetes46%
- Arthritis45%
- Osteoporosis43%
- Chronic kidney disease36%
Hospitals where Margaret C. Flynn works
Medicare's Facility Affiliation Data lists Margaret C. Flynn at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Elliot HospitalManchester, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300012
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300003
- Monadnock Community HospitalPeterborough, NH · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 301309
- Southern NH Medical CenterNashua, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300020
- St Joseph HospitalNashua, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300011
Practice locations
Addresses where Margaret C. Flynn is enrolled with Medicare (CMS data updated October 2, 2026).
- 166 Kinsley St, Suite 101Nashua, NH 03060 (603) 881‑7141
Group practices
Medicare enrollment lists Margaret C. Flynn as a member of this group (CMS data updated October 2, 2026).
- St. Joseph Hospital of Nashua NH273 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Nashua
Clinicians with the same Medicare primary specialty in Nashua, NH — not a recommendation.
Other clinicians in St. Joseph Hospital of Nashua NH
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Geisel School Of Medicine At Dartmouth |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821094491 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians